Weft detector for loom transferrer mechanism



Oct. 19 1926.

v E. R. HOLMES WBFT DETECTOR FOR LOOM TRANSFERRER MECHANISM Filed- April 24, 1925 2 Sheets-Sheet 1 ,3 mag/s m M Oct. 19 1926.

E. R. HOLMES WEFT DETECTOR FOR LOOM TRANSFERRER MECHANISM 2 Sheets-Sheet 2 Filed April 24, 1925 UNITE ELBRIDGE B. HOLMES, OF 'WURCESTER, BEASSACH'USETTS, ASSIG'NOR TO CRQIVIPTON 8c KNOWLE$ LOOM WORKS. 031" V OECIESTER, hIASSACI-IUSETTS, A CORPORATZON OF MASSACHUSETTS.

DETECTOR FOR LOOM TRANSFERBER MECHANISM.

Application filed April 24-, 1925. Serial No. 25,642.

This invention relates to waft detectors for looms and more particularly to the type of detector carried on a regularly moving transferrer arm, such as shown in prior Patent No. 1,372,316.

In detectors as set forth in said patent there is slidably mounted on the transferrer a plunger or pin which is moved into the path of a cam lever by a detector at the time weft exhaustion is indicated. It has been found that as exhaustion approaches, the detector strikes the plunger but with insufficient force to move the same its full distance, with the result that faulty indication is given to the replenishing mechanism.

It is the general object of my invention to provide means to prevent improper indication even though the plunger be struck by the detector prior to the time when i11- dication should be given.

It is a further object of my invention to provide means forlocking the indicating plunger in its normal position and releasing it by a second plunger actuated by the detector.

With these and other objects in view whichwill appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein I have shown one form of my invention,

Fig. 1 is a side elevation of a multi-color weft replenishing mechanism having my invention applied thereto,

Fig. 2 is a detail rear view of the rocking lever which resets my improved plunger, looking in the direction of arrow 2, Fi 1,

Fig. 3 is an enlarged rear elevation of the transferrer arm,

Fig. 4 is a view similar to Fig. 3 but with parts in section.

Fig. 5 is a vertical section on line 5-5 of Fig. 3,

Flg. 6 1s a fragmentary view similar to Fig. 4 but with the parts in a different position, and

Fig. 7 is a detail top planview of the locking plunger forming part of my invention.

Referring more particularly to the drawings it will be seen that I have provided a loom frame 10 on which is mounted a multireleasing devices 13. A box motion controlled lever 14 is pivoted as at 15 to the stand 11 and has secured thereto a slotted collar 16 having driving connections with a color slide 17 which is moved laterally to be in operative position with respect to the upper and lower lugs 18 and 19, respectively, of one or another of the slides 12. Said color slide is movable in bearings 20 to control any of said slides but controls only one at a time. The slide is rocked in the bearings 20 by a lever 21 and link connection 22 and said link is pivotally connected as at 23 to lever 24 pivoted at 25 to the frame of the replenishing mechanism. Whenever the horizontal arm of the lever 24 is depressed the color slide will be given a movement to elevate the slide 12 which it controls.

The transferrer arm 26 is pivotally mounted on a stud 27 secured to the stand 11 and is reciprocated by a rising and falling link 28 actuated from a cam not shown. Pivotally mounted on a fixed pivot 29 is a trip lever 30 having a pad 31 for a purpose to be described and having connected thereto as at 32 the lower end of a link 33 the upper end of which extends through alng 34 and has secured thereto a collar 35. l nterposed between said collar and the lug 34 is a compression spring 36 which serves normally to hold the trip lever in raised position as shown in Fig. 1. A collar 37 on link 33 limits upward movement of lever 30. The matter thus far described is substantially the same as set forth in Patents No; 1.030,?48 and No. 1,372,316.

My improvements relate more particularly to the detector mechanism which controls the lever 24 and as shown in Figs. 3' to 6 I have provided the transferrer arm 26 witl an offset foot 40 having a bobbin head engaging portion 41 and a yarn engaging portion 42. That portion of the transferrer arm which connects with the foot is solid as indicated at 43 and slot 44 extends vertically through the hammer between the portions 42 and 43. The lateral walls 45 of the slot 44 have extending therebetween a plunger support 46 integral therewith.

The side walls are each provided with an upstanding car 47 supporting a pin ts on which is pivotally mounted a lever l9. Extending laterally from the inner end of said lever {i9 is a finger 5O integral therewith and positioned to engage the pad 31 when the transfcrrer is moved downwardly by the link 28. The other end of said lever 49 has pivotally connected thereto as at 51 a detector 52 of the side slip type having a detecting surface 58 to engage the bobbin and having a stop screw 54; in the upper end thereof to enga a stop 55 on the arm l9 to limit motion of. said detector 52 toward the portion 42. Lever l9 is provided with a bore 56 which receives a plunger 57 pivotally connected to the detector. asv at 58. A compression spring 59 is interposed between the lever 4L9and a shoulder 60 formed on the il unger 57 to hold. the screw 54 against stop 55 and position the detector 52 so that the detecting surface 53 is offset laterally from the pivot 51 of said lever. 4L9. Lever 49. is also provided 7 with a depending arm 61 through which extends an opening 62 for a purpose to be described.

An indicating plunger hav1ng an enlarged head 71, is guided in the portions l3 and 46 andalso extends through bore 62 of the arm. 61 A spring, 72 is interposed between the head 71' and the arm 61., to hold the arms 49 in the'position indicated in Fig. 4 and also tending. normally to move the pin 70 toward lever 2i. Said pin70 is pro vided with a circumferential;groove 73' in the lower side of which fits a ball lock 74-. Said ball is held in position by the releasing plunger 7 5 guided in the support a6 and held in normal position to the left as'shown in Fig. etby a compression spring 76. Said release pin 7 5 is formed with a projecting end 77 and is provided with a circumferential notch "TSsimilar to the notch 73 and has extending therethrough a vertical slot 79 across which extends a pin 80 secured to said pin 75. The lower face of the support. 46 receives a. screw 81 which has. an upwardly extending tip 82-. Spring 76 holds the pin 80 against the tip 82toposition the pin 75 substantially as shown in Fig. l'with the notch 78 therein laterally offset 'with re spect to the ball lock 74 The. screw 81 is slight-lvlarger than the ball to'permit the latter to be inserted in place.

he lower end ofthe lever 2-l-is provided with a cam face83/ and as shownin Fig. 2 is pzfovidedwith a second cam face Set In operation the link 28.will reciprocate to lower the transferrer arm 26 every second pick of the loom to cause engagement of. the tip 31. by finger 50 on lever a9, and so'longaas sufficient yarn. is present the de tector 52 will he. held against movement along the bobbin and spring 36will;be compressed. When insufficient yarn for con tinued weaving remains on the bobbin the detector will move along the bobbin as indicated in dotted lines in Fig. 3 and will move the lock pin 75 from the position shown in Fig. t to the position shown in Fig; 6 with the notch 78 therein directly under the ball 74. The latter will therefore drop from its normal position and spring 72 will move the plunger ?O to the ri ht to project beyond the end of the transrerrer as shown in dotted lines in Fig. 3. lVhen this occurs the transferrer is. in its lowest position and the plunger 70 is below the cam face83- lonsequen tlv when the transferrer. arm 26 is raised the plunger will move along the cam face 83 to give. the lever24- a clockwise oscillation to rock the color slide 17 and the slide 12 corresponding to the active shuttle will be raised. As the transferrer arm. continues to move upwardly theplunger 70 will enter a space 85 in the lever 24; which will permit the. latter to move back to the position shown in full lines in Fig. l in a manner. similar. to that set forth in the aforesaid Patent llo. 1,372,316. Because of thefact that, the hall ilengages a cylindrical portion of the plunger 70 when int/he notch 78' it will be possihlefor said plunger TOtohe restored to normal. position as the transferrcr arm is raisedto move. the plunger in contact with cam face 84lon the arm 24-. As soon as the notch 73 appears above the ball-T l compression. spring. 76 will move the lock plunger 75 to the left and. the partswill be restored to their, normal position shown in. Fig. A check nut 86 on the plunger 70 limitsoutward movement of the latter.

' From the foregoing it will. be seen 'that I have provided a weft detector. of the type mounted on a regularly reciprocating transferrer arm so designed that the plunger '75 can receive slight motion. from the detector 52 without permitting movement of the actuating plunger 70 and that the latter will not move to operative position until the novement of the detector'52 is comple e and the lock. pin 75 has been moved its full distance. It will also be seen that the spring 7 2 serves the doublefunction of holdin =hc lever 49in normal. position and also of moving the plunger 70 to operative pozition.

Having thus; described n y invention it will be apparent that changes and modifications may be made therein by thoe skilled in the art without departing from the spirit and: scope of the invention, and 1 do not wish to be limited; to the details herein disclosed but what I claim is: I

1. In a weft detector for loom weft re plenishing mechanism, a regularly reciprocating transferrer arm, an indicating lever pivotally mounted on the replenishing mechanism, a weft detector mounted on the transferrer arm and movable therewith, a plunger mounted on the transferrer arm and tending normally to move toward the indicating lever, and a ball lock to retain said plunger away from the indicating lever, said lock being released by the detector at substantial exhaustion of weft so that said plunger may move toward the indicating lever.

2. In a weft detector for loom weft replenishing mechanism, a regularly reciprocating transferrer arm, an indicating lever for the replenishing mechanism, a detector lever pivotally mounted on the transferrer arm, a detector mounted on said detector lever, a plunger slidably mounted on the transferrer arm, a locl: normally holding said plunger out of operative position with respect to the indicating lever, and resilient means interposed between the detector lever and the plunger tending normally to hold said detector in inoperative position and tending to move said plunger into opetative position with respect to the indi itiug lever when said lock is released by the detector upon indication of substantial exhaustion.

In a weft detector for loom weft re- )lenishing mechanism, a regularly reciprocating transferrer arm, an indicating lever for the replenishing mechanism, a detector mounted on the transferrer arm and movable therewith, a pair of plungers mounted on said transferrer arm, and a ball lock interposed between said plungers, one of said plungers being engaged by the detector when the latter indicates substantial exhaustion to release the lock, and resilient means to move the other plunger into operative position with respect to the indicating lever.

l. In a weft detector for loom weft replenishing mechanism, a regularly reciproeating transferrer arm, an indicating lever for the replenishing mechanism, a detector mounted on. and movable with the transfcrrer arm, a pair of substantially parallel plunger slidable on and movable with said trans-terror arm, said plungers having notches therein normally out of alignment, a ball loch between said plungers received by one of the notches, one of said plungers being engaged and moved by the detector when the latter indicates substantial weft exhaustion to release said ball lock, and resilient means to move the other plunger into operative relation with respect to the indicating lever.

5. In a weft detector for loom weft replenishing mechanism, a regularly reciproeating transferrer arm, an indicating lever for the replenishing mechanism, a detector mounted on and movable with the transferrer arm, a plunger for the indicating lever slidably mounted on said transferrer arm, a second plunger for said detector also mounted. on said transferrer arm, said plungers having notches therein normally out of aligmnent, a ball. lock interposed between said plungers and normally entering the notch of one of the plungers and engaging the other plunger, resilient means tending to move the plunger having the notch normally occupied by the ball into operative relation with respect to the indicating lever, said detector engaging the other plunger at indication of weft exhaustion to move the notch therein into position to receive the ball whereby to release the first plunger so that th resilient means may move the same into operative position with respect to the indicating lever, and additional. resilient means acting on the plunger engaged by the detector tending normally to move the notch therein out of position with respect to the ball.

6. In a weft detector for loom weft replenishing mechanism, a regularly moving transferrer arm, an indicating lever pivotally mounted on the replenishing mechanism. a weft detector supported by and moving with the transferrer arm, a pair of spring pressed plungers, one for said indicating lever and one for said detector, and a ball lock located between and contacting with both of said plungers at all times, said plungers having normally offset notches therein, one of which normally receives the ball lock and the other of which is movable to register with the ball lock by the weft detector at indication of weft exhaustion.

7. In a weft detector for loom weft replenishing mechanism, a regularly moving transferrer arm, an indicating lever pivotally mounted on the replenishing mechanism, a weft detector supported by said transferrer arm, a pair of spring pressed plungers slidably mounted on the transferrer arm, one of said plungers for the indicating lever and the other of said plungers for the detector, a ball lock intermediate the plungers and normally in contact with both of said plungers, said plungers each having a notch for the reception of the ball lock, said notches being normally offset and the plunger for the indicating lever being normally locked by having the ball in the notch thereof, the plunger for the detector being movable by the latter at indication of weft exhaustion to move the corresponding notch in registry with the ball to release the plunger for the indicator, and positive means to move the plunger for the indicating lever to move the notch therein back in registering position with the ball to release the plunger for the detector.

8. In a weft detector for loom weft replenishing mechanism, a regularly reciprocating transferrer arm, an indicating lever for the replenishing mechanism, a detector supported by and movable with the transferrer arm, a pair of plungers mounted on and slidable in said transferrer arm, one of said plungers being normally out of operative position with respect to the indicating lever and being movable into operative position with respect thereto and the other plunger being engageable by the detector when the latter indicates Weft exhaustion and movable by said detector, and a lock interposed between said plungers and lnovable by either plunger.to lock the other plunger.

In testimony whereof I have hereunto affixed my signature.

ELBRIDGE R. HOLMES. 

